Thin-type electrical connector having a locking function

An electrical connector including a first and a second connector fitted to each other in a first direction, said first connector comprising:

• a locking member extending in said first direction and displaceable in a second direction perpendicular to said first direction;
• a lever extending from said locking member in a third direction perpendicular to said first and said second directions;
• a protruding portion protruding from said lever in said second direction;
• an unlocking arm extending in said first direction and displaceable in said third direction, said locking member having an engaging portion to be engaged with said second connector in said first direction, said unlocking arm having a cam portion for pressing said protruding portion in said second direction when said unlocking arm is displaced in said third direction, said second connector having a locking portion to be engaged with said engaging portion in said first direction when said first and said second connectors are fitted to each other, engagement between said engaging portion and said locking portion begin released when said protruding portions pressed by said cam portion to displace said locking member in said second direction through said lever;
• and
• wherein said first connector comprises a plurality of contacts, said contacts, said locking member, and said unlocking arm being arranged on a substantially common plane to be parallel to one another in said third direction.

A plug connector comprising:

• a locking member extending in a first direction and displaceable in a second direction perpendicular to said first direction;
• a lever extending from said locking member in a third direction perpendicular to said first and said second directions;
• a protruding portion protruding from said lever in said second direction;
• an unlocking arm extending in said first direction and displaceable in said third direction, said locking member having an engaging portion to be engaged with a receptacle connector in said first direction, said unlocking arm having a cam portion for pressing said protruding portion in said second direction when said unlocking arm is displaced in said third direction, engagement between said engaging portion and said receptacle connector being released when said protruding portion is pressed by said cam portion to displace said locking member in said second direction through said lever;
• and
• a plurality of contacts, wherein said contacts, said locking member, and said unlocking arm are arranged on a substantially common plane to be parallel to one another in said third direction.

A receptacle connector to be fitted in a first direction to a plug connector, which comprises:

• a locking member extending in said first direction and displaceable in a second direction perpendicular to said first direction;
• a lever extending from said locking member in a third direction perpendicular to said first and said second directions;
• a protruding portion protruding from said lever in said second direction;
• an unlocking arm extending in said first direction and displaceable in said third direction said locking member having an engaging portion to be engaged with a receptacle connector in said first direction said unlocking arm having a cam portion for pressing said protruding portion in said second direction when said unlocking arm is displaced in said third direction engagement between said engaging portion and said receptacle connector being released when said protruding portion is pressed by said cam portion to displace said locking member in said second direction through said lever;
• said receptacle connector comprising a metal shell and a locking portion formed on said metal shell to be engaged with said engaging portion in said first direction when said receptacle connector is fitted to said plug connector, wherein said metal shell has a locking window having an edge serving as said locking portion, and
• wherein said locking window is formed by drawing a part of said metal shell inward.